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a person or thing that brightens.
a chemical or other agent used to increase brightness, as one added to toothpaste or detergent to intensify the cleansing or bleaching process.
Historical Examples

The Brightener C. N. Williamson
The Brightener C. N. Williamson
The Brightener C. N. Williamson
Camilla Fanny Burney
The Brightener C. N. Williamson
The Brightener C. N. Williamson
Donahoe’s Magazine, Volume 15, No. 2, February 1886 Various


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